Before there were humans, dinosaurs walked the Earth. Before there was an Earth, there was just a big cloud of gas and dust floating out in the universe. Before there was a universe...well, before that is a point that physicists spill a lot of ink over. We don't know what happened before the Big Bang gave birth to the universe, but the smartest people in science have plenty of fascinating theories.
Time Before Time
What Came Before The Big Bang? A Time Before Time
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